I have noticed when selling arms on the EE it is best to wait till there is a low volume of said firearms or products you are listing and in a trend if listed there will be a similar item listed at a similar price soon enough. Supply and Demand really.
With the polish rifles the value varies on condition. the one I listed is in excellent to perfect condition with a factory done stock correction at time of manufacture. With Russian M44's rising to 550-600 it only makes sense that the Polish rifles command a 30-50% premium. PM me with some pictures and i'll try and help ya with identification if you need.